Final answer:
The troposphere is the lowest layer where we live and where weather occurs, and it's protected by the ozone layer which guards against UV light. Higher altitude leads to lower air pressure, and the Earth's magnetic field and atmosphere, including the greenhouse effect, provide a habitable climate.
Step-by-step explanation:
We live at the bottom of an ocean of air.
Layers of air keep us protected from the harshness of space.
The troposphere is the lowest layer of the atmosphere.
The ozone layer protects us from U.V. light.
The higher we are in altitude, the lower the air pressure.
Your ears pop in an airplane because there is lower air pressure.
Water boils easier in the mountains because there is less air pressure.
The Earth's magnetic field blocks gamma rays.
In the jet stream of the upper atmosphere, there are strong winds.
The stratosphere converts oxygen to ozone from the ultraviolet rays.
The atmosphere keeps the Earth warm using the greenhouse effect.
Our weather is found in the troposphere that is 10 kilometers thick.
Air around the Earth keeps it temperate.